ZenFone 4 Pro (ZS551KL, SE)

ZenFone 4 Pro is the ultimate expression of ASUS smartphone design, crafted to provide luxury in every detail and featuring dual cameras to deliver an unparalleled mobile photography experience. ZenFone 4 Pro has a standard camera with the Sony flagship IMX362 image sensor, an F1.7 aperture lens and a 10x total zoom capability, plus a front-facing selfie camera with fast phase-detectionauto-focus, enabling you to capture gorgeous photos that rival professional cameras. ZenFone 4 Pro is the world’s first smartphone to incorporate three high-end Sony image sensors, and the ASUS SuperPixel™ Engine ensures up to 8x brighter photos in low light. Powered by the latest Qualcomm® Snapdragon™ S835 mobile platform and 6GB RAM, ZenFone 4 Pro delivers a smooth and responsive camera experience, and the best performance with today’s apps and games.

ZenFone 4 Pro features dual cameras to take your mobile photography to new heights. It is equipped with the industry-leading Sony IMX362 image sensor to capture up to 8x* brighter and clearer photos in low light. When you need to get closer, switch instantly to the 16MP camera with a 2x optical zoom and 10x total zoom to shoot beautifully detailed telephoto pictures. Both camera lenses are covered with extremely durable sapphire glass to protect against scratches. Qualcomm Spectra™ image signal processing improves your photography experience even further, providing smoother zooming, faster auto-focus, and photos with gorgeous, true-to-life colors.

To capture real-world authenticity, ZenFone 4 Pro packs a main camera with a wide F1.7 aperture, the latest Sony® IMX362 image sensor with a large 1.4µm pixel size, and a six-element lens that allows more light to reach the sensor. Together with ASUS SuperPixel™ Engine that effectively increases captured light by up to 8x*, and optical image stabilization (OIS) that enables shooting photos with slower shutter speeds than normally possible, ZenFone 4 Pro captures sharper, brighter and clearer photos at night and in low-light environments.

ASUS SuperPixel™ Camera — ZenFone 4 Pro offers 8x light sensitivity than other smartphones thanks to its new ASUS SuperPixel™ main camera that allows users to take extremely fast and clear photos at night or in low-light environments. The SuperPixel™ Camera consists of following components:

Large F1.7 lens aperture

The large aperture allows for more light to enter the sensor compared to other smartphone cameras.

F2.2 aperture

F1.8 aperture (49% more light than F2.2)

ZenFone 4 Pro F1.7 aperture (67% more light than F2.2)

Large 1.4µm pixel size

Larger pixels increase the camera’s sensitivity to light and decrease the graininess of resulting photos — especially those shot in low-light environments. ZenFone 4 Pro uses the Sony IMX362 sensor with 1.4µm pixels and a 1/2.55-inch sensor size, which are among the largest of any smartphone camera sensor and make ZenFone 4 Pro excellent for low-light photography.

1.0µm pixel size

1.22µm pixel size (48% more light than 1.0µm)

ZenFone 4 Pro 1.4µm pixel size (96% more light than 1.0µm)

ASUS SuperPixel™ Engine

An exclusive image processor boosts sensor light sensitivity by up to four times by intelligently controlling ISO levels while shooting and performing noise removal in post-shot processing. Along with Qualcomm® Spectra™ image signal processing, two dedicated image processors even bring photography experience to next level, providing smoother zooming, faster autofocus, and photos with gorgeous, true-to-life colors.

4-Stop OIS

Four stops optical image stabilization (OIS) allows the camera lens to move in eight directions to neutralize camera shake caused by unsteady hands, resulting in consistently sharp photos. OIS also enables you to shoot handheld using shutter speeds that are four stops slower than traditional cameras, letting you shoot gorgeously, blur-free photos at night and in low-light situations.

PixelMaster Technology

Capture reality, fast and steady

The camera on ZenFone 4 Pro lets you capture the world as you see it by TriTech+™ technology. With ultrafast, dual pixel phase-detection, subject-tracking, and laser auto-focus, ZenFone 4 Pro accurately focuses in just 0.03 seconds and keeps moving subjects in focus to ensure clear and detailed photos. Together with both optical and electronic image stabilization for blur-free photos and videos, an RGB color-correction sensor for true-to-life colors, and true 4K UHD video recording, the camera on ZenFone 4 Pro goes above and beyond other smartphones.

0.03S

TriTech+™technology

dual pixelPDAF

laserauto-focus

subject-trackingauto-focus

OIS & EIS

4K

UHD videorecording

RGB colorcorrection sensor

Learn more about PixelMaster technology

Catch the moment with speed and precision

ASUS TriTech+™ auto-focus — ZenFone 4 Pro has an improved TriTech+™ auto-focus system that incorporates three focusing technologies, including the new dual-pixel phase-detection auto-focus (PDAF), second-generation laser auto-focus and subject-tracking auto-focus. ASUS TriTech+™ automatically chooses the best technology to use depending on the subject, and achieves focus in an amazingly fast 0.03 seconds — the world’s fastest auto-focus.

0.03S

dual pixel PDAF

0.03S

subject-tracking auto-focus

3X

laser focus distance

dual pixelPDAF

second-generationlaser auto-focus

subject-trackingauto-focus

Each pixel on ZenFone 4 Pro's image sensor is divided into two phase-detection areas that detect subject movement by analyzing variations between light rays hitting the two sensors. With more than 12 million pixels on the sensor performing this task in concert, ZenFone 4 Pro’s phase-detection auto-focus system is able to achieve ultrafast focus, even in low light conditions.

5%

600,000 pixels for light detection

Phase Detection Auto-Focus

100%

12,000,000 pixels for light detection

ASUS Dual Phase Detection Auto-Focus

ZenFone 4 Pro’s laser auto-focus has three times the range of standard laser focusing systems for a range of up to 1.5 meters.

ZenFone 4 Pro’s camera cleverly tracks moving subjects, so they will never be out of focus. Subject tracking is enabled by default for both still images and videos.

Smartphone photos are often marred by unnatural colors, typically caused by artificial lights — so ZenFone 4 Pro has an RGB color correction sensor to capture the scene as you see it. It detects the type of light and automatically applies adjustments to achieve beautiful, natural colors. ZenFone 4 Pro shoots video at up to 4K UHD resolution (3840 x 2160) — 4 times the quality of Full HD — letting you enjoy capturing and sharing your memories with incredible levels of detail.

RGB color correction sensor

4K

UHD video recording

PixelMaster Camera Modes

Shoot like a pro, capture the fun

ZenFone 4 Pro’s camera features optional manual controls similar to those found on DSLRs, giving you pro-level creative control over your photography. Pro mode provides complete camera control with one-touch adjustments to shutter speed, white balance, exposure and ISO settings, as well as the option to shoot in RAW format, allowing you to capture stunning images that truly express your photographic vision. In addition to its advanced, manual controls, ZenFone 4 Pro’s camera has an assortment of fun, creative modes to enhance your photography experience and let you easily achieve professional-looking results.

RAW support

Pro mode

Learn more about PixelMaster camera modes

RAW file support

ZenFone 4 Pro offers the freedom to shoot photos in RAW format, which saves the full data of the photo captured by the camera’s sensor and is ideal for enhancement with editing software. Enhancements possible with RAW files include uncovering fine details in shadows, recovering overexposed highlights, and adjusting exposure with much more latitude than with JPEG files.

Pro mode

Pro mode enables full control over ZenFone 4 Pro’s extensive camera settings, including white balance, exposure, focus, ISO, and an impressive range of shutter speeds from 1/10000 to 32 seconds. With the ability to shoot with such long exposures, you can capture gorgeous light trails or stunning night-sky photographs like those traditionally shot with DSLR cameras.

Portrait mode automatically creates a shallow depth-of-field effect ideal for portrait photography that keeps the subject sharp while creating a beautifully blurred background. Previously only possible with DSLR cameras, ZenFone 4 Pro is able to achieve this effect — known as bokeh — with advanced software processing, making it possible to create professional-looking portraits and close-ups with ease.

ZenFone 4 Pro makes you even better looking before your eyes. Just fire up ASUS SelfieMaster™ with its smart beautification function, you can choose 10-level beautification to balance facial features, soften complexions and remove skin blemishes to create flawless photos — all in real time, not just photo and video, even in live stream.

10- level

beautification

Photobeautification

Videobeautification

BeautyLive

Collage

Slideshow

Livestream beautification

Share the perfect look on your favorite social-networking sites with SelfieMaster’s new live-streaming beautification technology and supporting app! See your skin smoothed and blemishes removed in real time, and share a more beautiful you with friends and followers! ZenFone 4 Pro also has two built-in MEMS microphones that automatically detect and eliminate background noise in order to enhance voice pickup. Stream whenever and wherever you want, and look better than ever — that’s the magic of ZenFone 4 Pro!

To help prevent unauthorized use, ZenFone 4 Pro has an advanced, extra-secure live fingerprint sensor. A capacitive sensor detects your fingerprint pattern in the usual way, but there’s also an additional optical infrared sensor that detects blood flow under your skin. This technique, also used in the medical world, ensures that there’s always a live person attached to the fingerprint, not a fake! With ZenFone 4 Pro, you get extra peace of mind — especially when you're using convenient mobile payment systems.

Capacitive & infrared optical

Dualsensors

Infrared receiverInfrared emitterCapacitive sensor

CPU + GPU

Gaming made easy

ZenFone 4 Pro is powered by the flagship 64-bit Qualcomm® Snapdragon™ 835 octa-core processor that offers tremendous performance with eight CPU cores, up to a 2.45GHz clock speed and up to 6GB RAM. Second-generation, 10nm Fin Field Effect Transistors (FinFETs) deliver 20 percent improved performance, while reducing power consumption by 25 percent compared to the previous-generation Snapdragon 820 processor. Together with desktop-grade Adreno™ graphics, ZenFone 4 Pro handles even the most demanding apps and games with ease.

20%

improved performance

Powerful Network

The world’s fastest LTE connectivity

ZenFone 4 Pro provides incredibly fast connectivity, supporting both Cat 16 LTE Advanced cellular networking and dual-band 802.11ad Wi-Fi for download speeds of up to 1Gbps. You can also turn ZenFone 4 Pro into a portable Wi-Fi hotspot and share Gigabit connectivity with other mobile devices.

LTE

Cat16

up to 1Gbps download

LTE

4CA

4x4 MIMO support

Wi-Fi

11AD

1Gbps download

Battery & BoostMaster™

Charge faster, work and play longer

When creating ZenFone 4 Pro, ASUS engineers combined the fantastic energy-efficiency of the Qualcomm® Snapdragon™ 835 processor with a high-capacity 3600mAh lithium polymer battery, so you can watch videos for up to 21 hours! And when it’s time to recharge, ASUS BoostMaster technology provides 18W (9V/2A) of power for incredibly fast charging. With ZenFone 4 Pro’s supplied adapter, just a five-minute charge provides two hours of talk time, and built-in safeguards protect against overcharging.

3600mAh

battery

Fast charging

by 5 mins charged

Up to

21hrs

720p video playback

Up to

17hrs

Wi-Fi web browsing

Design

Timeless Zen design, simplicity

ZenFone 4 Pro evolves the prestigious ZenFone design lineage with numerous refinements that give it a singular beauty and provide an unparalleled user experience. Crafted with a solid aluminum unibody using advanced Nano Molding Technology (NMT), ZenFone 4 Pro is thin and light, yet incredibly strong. An expansive 5.5-inch display is surrounded by an ultra-narrow bezel, providing a cinematic view and a slimmer width for easy one-handed operation. ZenFone 4 Pro’s dual camera system is integrated completely within the phone chassis for a perfectly flat rear surface with no protrusions. Both the front and rear of the ZenFone 4 Pro are encased in 2.5D curved Corning® Gorilla® Glass that provides a more comfortable grip and a durable, scratch-resistant finish. A fine, diamond-cut metal edge provides a luxurious accent. ZenFone 4 Pro is available in two luxurious colors: Moonlight White and Pure Black.

2.5D

Gorilla Glass

2.1mm

slim bezel

7.6mm

thin edge

NMT

metal unibody

Display

Sensational display with auto color tuning

With a bright 500-nit AMOLED display, Full HD (1920 x 1080) resolution, and a color gamut that’s greater than 100 percent of NTSC color space, ZenFone 4 Pro makes photos, videos, and all your other content look as vibrant as real life. An ambient light sensor with ASUS Splendid technology adjusts the color temperature of the display based on environmental lighting, resulting in a natural and comfortable viewing experience.

1920X1080

resolution

500nits

brightness

100%

NTSC

Splendid technology

Learn more about display

True2Life

ASUS Tru2Life technology uses the latest image processing techniques to make videos look more realistic by optimizing contrast and detail on each pixel. Tru2Life technology on ZenFone 4 Pro also uses the ambient sensor to detect lighting conditions and then adjusts the brightness and overall look of the display accordingly for true-to-life video and a clearer, more vivid outdoor viewing experience in bright sunlight. With ASUS Tru2Life technology, it’s just like being there.

SonicMaster 4.0

Unrivalled smartphone audio

ZenFone 4 Pro has supreme audio performance for entertainment and phone calls. It is equipped with dual speakers driven by a powerful Smart AMP that delivers expansive, stereo sound with minimal distortion, even at high volumes. The two speakers project sound in different directions to create immersive listening experiences for all of your multimedia content. Hi-Res Audio certification enables 24-bit/192kHz — 4x CD quality — audio playback. The all-new AudioWizard app has custom Listening Profile mode, which automatically adapts the sound profile to your preference, providing the best audio experience for you, and DTS Headphone:X™ provides theater-quality 7.1-channel virtual surround sound over headphones.

4X

CD quality

dual speakers

3 noise-cancelling microphones

Smart AMP

Hi-Res Audio

DTS Headphone:X

Learn more about SonicMaster 4.0

Noise reduction microphone, high fidelity headphones

ZenFone 4 Pro features three noise-canceling microphones to remove unwanted environmental sounds for the best call quality and clear sound when recording videos or live streaming. ZenFone 4 Pro comes with ZenEar earphone to let you enjoy cinema-quality entertainment and high-quality voice and video calls on the go.

ZenUI 4.0

Simpler. Faster. Smarter.

Simpler, faster and even smarter than ever, ASUS ZenUI 4.0 features a new visual design and keeps only the essential apps. It works faster thanks to quicker response across the board too. Smart new, automated ZenUI features make life easier including: auto face tagging in Gallery, Safeguard that automates communications in emergencies, Page Marker which helps you bookmark web pages and more.

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